Hey there Ambra,
I know exactly what you mean! You and I have the same RO at JH. I did have a PET at 14 weeks post Tx and I was NED. I was told the same thing. No more PET scans or CAT scans. A yearly chest x-ray was all that will be required. I feel somewhat uneasy about it but then I put my life in their hands and I'm here so they must have a reasonable explanation. I spoke with Mysha about it but I, like you, want a more detailed reason why.
I've was scoped in September and last month and everything looked great. There's no reason to think the cancer has returned nor do I have any symptoms that make me suspect there's an issue.
Let us (and me) know what you find out and congrats! One more and done! The healing can begin
Positive thoughts and prayers
"T"